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University of South Carolina

Theses and Dissertations

2016

Analysis Of Student Response Data

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The Impact Of The Choice Of The Item Response Theory Model Used In The Analysis Of Student Response Data From Statewide Educational Assessments, Maureen O’Gorman Petkewich Jan 2016

The Impact Of The Choice Of The Item Response Theory Model Used In The Analysis Of Student Response Data From Statewide Educational Assessments, Maureen O’Gorman Petkewich

Theses and Dissertations

The practical significance of the item response theory model (IRT) choice on the results of a statewide assessment was investigated at multiple decision making levels: the examinee level, school and district summary levels, and in terms of impact to subgroups. Data for the study included the student response matrix for South Carolina’s 2014 Palmetto Assessment of State Standards (PASS). The Rasch model, used with PASS and in nearly half of PASS-like multiple-choice statewide assessments in other states, was compared to another popular IRT model used in similar statewide assessments: the 3PL model.

Model fit checks indicated that the 3PL had …